289806920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{557321}}^1$

素因数の和:557345

約数の個数: 32

約数和(自身を含む): 702225720

約数和(自身を除く): 412418800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 557321, 1114642, 2229284, 2786605, 4458568, 5573210, 7245173, 11146420, 14490346, 22292840, 28980692, 36225865, 57961384, 72451730, 144903460, 289806920]

約数ペア:

[(1, 289806920), (2, 144903460), (4, 72451730), (5, 57961384), (8, 36225865), (10, 28980692), (13, 22292840), (20, 14490346), (26, 11146420), (40, 7245173), (52, 5573210), (65, 4458568), (104, 2786605), (130, 2229284), (260, 1114642), (520, 557321)]